The judges called Sarah's display striking in appearance, that "upon examination, detailed studies of the significance of Colenso and Kawepo, as well as an examination of the historical links between the two, impress the reader with the level of underlying research and quality of historical ideas evident in the work".
Sarah was happy with the comments.
"It's just really nice to get acknowledgement of the work I put in," she said.
Sarah's history teacher Rose Waerea said it was the first time the school had submitted a student's work for consideration for the award.
"When I first saw Sarah's board I knew it was good enough to enter," Mrs Waerea said.
Sarah is also studying calculus, statistics, physics and chemistry. She is considering study of science, engineering or both at university next year.